中国普通野生稻和亚洲栽培稻核基因组的遗传分化

Genetic Differentiation of Nuclear DNA in Common Wild Rice (Oryza rufipogon Griff.) and Cultivated Rice (O.sativa L.)

通过对来自中国5个省（自治区）39份普通野生稻（OryzarufipogonGriff，）和33份亚洲栽培稻（O．sativaL．）的核DNA的RFLP分析，探讨了中国普野籼粳分化及其与栽培稻之间的遗传分化关系。结果表明，在核DNA分化上，中国普野可分为原始普野型、偏籼型和偏粳型。中国普野因地理分布不同，其遗传分化表现出多态性：江西东乡和湖南茶陵以及部分云南元江普野既不与籼稻聚在一起，又不与粳稻聚在一起，而独聚一类，其形态上亦比较原始，属于原始祖先型；广东、广西普野则表现为偏籼或偏粳。本研究认为籼粳演化应该是多途径的。

Genetic differentiation of 39 accessions of common wild rice (O. rufipogon Griff.) from China, and 33 varieties of cultivated rice (O. sativa L. ) were studied by nuclear DNA RFLP analysis. Common wild rice from China could be classified into three types:primitive type , Indica-like type and Japonica-like type. The diversity of the genetic differentiation was found among Chinese wild rice by their geographical distributions. All of the acessions from Dongxiang, Jiangxi Province, Chaling, Hunan Province and partial accessions from Yuanjiang, Yunnan Province are primitive type because they are not clustered into Indica group or Japonica group by nuclear DNA RFLP analysis and the morphological characteristics of them are more primitive. The wild rice from Guangdong and Guangxi are Japonica-like or Indica-like type in nuclear DNA. The diffferentiation of Indica and Japonica might be of multi-way.